Restoring authorship annotation for <axc@yandex-team.ru>. Commit 1 of 2.

1 files changed, 410 insertions, 410 deletions

diff --git a/contrib/tools/bison/gnulib/src/canonicalize-lgpl.c b/contrib/tools/bison/gnulib/src/canonicalize-lgpl.c
index 5cc9c5b4a0..929d1ca8e8 100644
--- a/contrib/tools/bison/gnulib/src/canonicalize-lgpl.c
+++ b/contrib/tools/bison/gnulib/src/canonicalize-lgpl.c
@@ -1,411 +1,411 @@
-/* Return the canonical absolute name of a given file.
-   Copyright (C) 1996-2013 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#ifndef _LIBC
-/* Don't use __attribute__ __nonnull__ in this compilation unit.  Otherwise gcc
-   optimizes away the name == NULL test below.  */
-# define _GL_ARG_NONNULL(params)
-
-# define _GL_USE_STDLIB_ALLOC 1
-# include <config.h>
-#endif
-
-#if !HAVE_CANONICALIZE_FILE_NAME || !FUNC_REALPATH_WORKS || defined _LIBC
-
-/* Specification.  */
-#include <stdlib.h>
-
+/* Return the canonical absolute name of a given file. 
+   Copyright (C) 1996-2013 Free Software Foundation, Inc. 
+   This file is part of the GNU C Library. 
+ 
+   This program is free software: you can redistribute it and/or modify 
+   it under the terms of the GNU General Public License as published by 
+   the Free Software Foundation; either version 3 of the License, or 
+   (at your option) any later version. 
+ 
+   This program is distributed in the hope that it will be useful, 
+   but WITHOUT ANY WARRANTY; without even the implied warranty of 
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+   GNU General Public License for more details. 
+ 
+   You should have received a copy of the GNU General Public License 
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */ 
+ 
+#ifndef _LIBC 
+/* Don't use __attribute__ __nonnull__ in this compilation unit.  Otherwise gcc 
+   optimizes away the name == NULL test below.  */ 
+# define _GL_ARG_NONNULL(params) 
+ 
+# define _GL_USE_STDLIB_ALLOC 1 
+# include <config.h> 
+#endif 
+ 
+#if !HAVE_CANONICALIZE_FILE_NAME || !FUNC_REALPATH_WORKS || defined _LIBC 
+ 
+/* Specification.  */ 
+#include <stdlib.h> 
+ 
 #include "palloca.h"
-#include <string.h>
-#include <unistd.h>
-#include <limits.h>
-#if HAVE_SYS_PARAM_H || defined _LIBC
-# include <sys/param.h>
-#endif
-#include <sys/stat.h>
-#include <errno.h>
-#include <stddef.h>
-
-#ifdef _LIBC
-# include <shlib-compat.h>
-#else
-# define SHLIB_COMPAT(lib, introduced, obsoleted) 0
-# define versioned_symbol(lib, local, symbol, version) extern int dummy
-# define compat_symbol(lib, local, symbol, version)
-# define weak_alias(local, symbol)
-# define __canonicalize_file_name canonicalize_file_name
-# define __realpath realpath
-# include "pathmax.h"
-# include "malloca.h"
-# include "dosname.h"
-# if HAVE_GETCWD
-#  if IN_RELOCWRAPPER
-    /* When building the relocatable program wrapper, use the system's getcwd
-       function, not the gnulib override, otherwise we would get a link error.
-     */
-#   undef getcwd
-#  endif
-#  ifdef VMS
-    /* We want the directory in Unix syntax, not in VMS syntax.  */
-#   define __getcwd(buf, max) getcwd (buf, max, 0)
-#  else
-#   define __getcwd getcwd
-#  endif
-# else
-#  define __getcwd(buf, max) getwd (buf)
-# endif
-# define __readlink readlink
-# define __set_errno(e) errno = (e)
-# ifndef MAXSYMLINKS
-#  ifdef SYMLOOP_MAX
-#   define MAXSYMLINKS SYMLOOP_MAX
-#  else
-#   define MAXSYMLINKS 20
-#  endif
-# endif
-#endif
-
-#ifndef DOUBLE_SLASH_IS_DISTINCT_ROOT
-# define DOUBLE_SLASH_IS_DISTINCT_ROOT 0
-#endif
-
-#if !FUNC_REALPATH_WORKS || defined _LIBC
-/* Return the canonical absolute name of file NAME.  A canonical name
-   does not contain any ".", ".." components nor any repeated path
-   separators ('/') or symlinks.  All path components must exist.  If
-   RESOLVED is null, the result is malloc'd; otherwise, if the
-   canonical name is PATH_MAX chars or more, returns null with 'errno'
-   set to ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
-   returns the name in RESOLVED.  If the name cannot be resolved and
-   RESOLVED is non-NULL, it contains the path of the first component
-   that cannot be resolved.  If the path can be resolved, RESOLVED
-   holds the same value as the value returned.  */
-
-char *
-__realpath (const char *name, char *resolved)
-{
-  char *rpath, *dest, *extra_buf = NULL;
-  const char *start, *end, *rpath_limit;
-  long int path_max;
-  int num_links = 0;
-  size_t prefix_len;
-
-  if (name == NULL)
-    {
-      /* As per Single Unix Specification V2 we must return an error if
-         either parameter is a null pointer.  We extend this to allow
-         the RESOLVED parameter to be NULL in case the we are expected to
-         allocate the room for the return value.  */
-      __set_errno (EINVAL);
-      return NULL;
-    }
-
-  if (name[0] == '\0')
-    {
-      /* As per Single Unix Specification V2 we must return an error if
-         the name argument points to an empty string.  */
-      __set_errno (ENOENT);
-      return NULL;
-    }
-
-#ifdef PATH_MAX
-  path_max = PATH_MAX;
-#else
-  path_max = pathconf (name, _PC_PATH_MAX);
-  if (path_max <= 0)
-    path_max = 8192;
-#endif
-
-  if (resolved == NULL)
-    {
-      rpath = malloc (path_max);
-      if (rpath == NULL)
-        {
-          /* It's easier to set errno to ENOMEM than to rely on the
-             'malloc-posix' gnulib module.  */
-          errno = ENOMEM;
-          return NULL;
-        }
-    }
-  else
-    rpath = resolved;
-  rpath_limit = rpath + path_max;
-
-  /* This is always zero for Posix hosts, but can be 2 for MS-Windows
-     and MS-DOS X:/foo/bar file names.  */
-  prefix_len = FILE_SYSTEM_PREFIX_LEN (name);
-
-  if (!IS_ABSOLUTE_FILE_NAME (name))
-    {
-      if (!__getcwd (rpath, path_max))
-        {
-          rpath[0] = '\0';
-          goto error;
-        }
-      dest = strchr (rpath, '\0');
-      start = name;
-      prefix_len = FILE_SYSTEM_PREFIX_LEN (rpath);
-    }
-  else
-    {
-      dest = rpath;
-      if (prefix_len)
-        {
-          memcpy (rpath, name, prefix_len);
-          dest += prefix_len;
-        }
-      *dest++ = '/';
-      if (DOUBLE_SLASH_IS_DISTINCT_ROOT)
-        {
-          if (ISSLASH (name[1]) && !ISSLASH (name[2]) && !prefix_len)
-            *dest++ = '/';
-          *dest = '\0';
-        }
-      start = name + prefix_len;
-    }
-
-  for (end = start; *start; start = end)
-    {
-#ifdef _LIBC
-      struct stat64 st;
-#else
-      struct stat st;
-#endif
-      int n;
-
-      /* Skip sequence of multiple path-separators.  */
-      while (ISSLASH (*start))
-        ++start;
-
-      /* Find end of path component.  */
-      for (end = start; *end && !ISSLASH (*end); ++end)
-        /* Nothing.  */;
-
-      if (end - start == 0)
-        break;
-      else if (end - start == 1 && start[0] == '.')
-        /* nothing */;
-      else if (end - start == 2 && start[0] == '.' && start[1] == '.')
-        {
-          /* Back up to previous component, ignore if at root already.  */
-          if (dest > rpath + prefix_len + 1)
-            for (--dest; dest > rpath && !ISSLASH (dest[-1]); --dest)
-              continue;
-          if (DOUBLE_SLASH_IS_DISTINCT_ROOT
-              && dest == rpath + 1 && !prefix_len
-              && ISSLASH (*dest) && !ISSLASH (dest[1]))
-            dest++;
-        }
-      else
-        {
-          size_t new_size;
-
-          if (!ISSLASH (dest[-1]))
-            *dest++ = '/';
-
-          if (dest + (end - start) >= rpath_limit)
-            {
-              ptrdiff_t dest_offset = dest - rpath;
-              char *new_rpath;
-
-              if (resolved)
-                {
-                  __set_errno (ENAMETOOLONG);
-                  if (dest > rpath + prefix_len + 1)
-                    dest--;
-                  *dest = '\0';
-                  goto error;
-                }
-              new_size = rpath_limit - rpath;
-              if (end - start + 1 > path_max)
-                new_size += end - start + 1;
-              else
-                new_size += path_max;
-              new_rpath = (char *) realloc (rpath, new_size);
-              if (new_rpath == NULL)
-                {
-                  /* It's easier to set errno to ENOMEM than to rely on the
-                     'realloc-posix' gnulib module.  */
-                  errno = ENOMEM;
-                  goto error;
-                }
-              rpath = new_rpath;
-              rpath_limit = rpath + new_size;
-
-              dest = rpath + dest_offset;
-            }
-
-#ifdef _LIBC
-          dest = __mempcpy (dest, start, end - start);
-#else
-          memcpy (dest, start, end - start);
-          dest += end - start;
-#endif
-          *dest = '\0';
-
-#ifdef _LIBC
-          if (__lxstat64 (_STAT_VER, rpath, &st) < 0)
-#else
-          if (lstat (rpath, &st) < 0)
-#endif
-            goto error;
-
-          if (S_ISLNK (st.st_mode))
-            {
-              char *buf;
-              size_t len;
-
-              if (++num_links > MAXSYMLINKS)
-                {
-                  __set_errno (ELOOP);
-                  goto error;
-                }
-
-              buf = malloca (path_max);
-              if (!buf)
-                {
-                  errno = ENOMEM;
-                  goto error;
-                }
-
-              n = __readlink (rpath, buf, path_max - 1);
-              if (n < 0)
-                {
-                  int saved_errno = errno;
-                  freea (buf);
-                  errno = saved_errno;
-                  goto error;
-                }
-              buf[n] = '\0';
-
-              if (!extra_buf)
-                {
-                  extra_buf = malloca (path_max);
-                  if (!extra_buf)
-                    {
-                      freea (buf);
-                      errno = ENOMEM;
-                      goto error;
-                    }
-                }
-
-              len = strlen (end);
-              if ((long int) (n + len) >= path_max)
-                {
-                  freea (buf);
-                  __set_errno (ENAMETOOLONG);
-                  goto error;
-                }
-
-              /* Careful here, end may be a pointer into extra_buf... */
-              memmove (&extra_buf[n], end, len + 1);
-              name = end = memcpy (extra_buf, buf, n);
-
-              if (IS_ABSOLUTE_FILE_NAME (buf))
-                {
-                  size_t pfxlen = FILE_SYSTEM_PREFIX_LEN (buf);
-
-                  if (pfxlen)
-                    memcpy (rpath, buf, pfxlen);
-                  dest = rpath + pfxlen;
-                  *dest++ = '/'; /* It's an absolute symlink */
-                  if (DOUBLE_SLASH_IS_DISTINCT_ROOT)
-                    {
-                      if (ISSLASH (buf[1]) && !ISSLASH (buf[2]) && !pfxlen)
-                        *dest++ = '/';
-                      *dest = '\0';
-                    }
-                  /* Install the new prefix to be in effect hereafter.  */
-                  prefix_len = pfxlen;
-                }
-              else
-                {
-                  /* Back up to previous component, ignore if at root
-                     already: */
-                  if (dest > rpath + prefix_len + 1)
-                    for (--dest; dest > rpath && !ISSLASH (dest[-1]); --dest)
-                      continue;
-                  if (DOUBLE_SLASH_IS_DISTINCT_ROOT && dest == rpath + 1
-                      && ISSLASH (*dest) && !ISSLASH (dest[1]) && !prefix_len)
-                    dest++;
-                }
-            }
-          else if (!S_ISDIR (st.st_mode) && *end != '\0')
-            {
-              __set_errno (ENOTDIR);
-              goto error;
-            }
-        }
-    }
-  if (dest > rpath + prefix_len + 1 && ISSLASH (dest[-1]))
-    --dest;
-  if (DOUBLE_SLASH_IS_DISTINCT_ROOT && dest == rpath + 1 && !prefix_len
-      && ISSLASH (*dest) && !ISSLASH (dest[1]))
-    dest++;
-  *dest = '\0';
-
-  if (extra_buf)
-    freea (extra_buf);
-
-  return rpath;
-
-error:
-  {
-    int saved_errno = errno;
-    if (extra_buf)
-      freea (extra_buf);
-    if (resolved == NULL)
-      free (rpath);
-    errno = saved_errno;
-  }
-  return NULL;
-}
-versioned_symbol (libc, __realpath, realpath, GLIBC_2_3);
-#endif /* !FUNC_REALPATH_WORKS || defined _LIBC */
-
-
-#if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3)
-char *
-attribute_compat_text_section
-__old_realpath (const char *name, char *resolved)
-{
-  if (resolved == NULL)
-    {
-      __set_errno (EINVAL);
-      return NULL;
-    }
-
-  return __realpath (name, resolved);
-}
-compat_symbol (libc, __old_realpath, realpath, GLIBC_2_0);
-#endif
-
-
-char *
-__canonicalize_file_name (const char *name)
-{
-  return __realpath (name, NULL);
-}
-weak_alias (__canonicalize_file_name, canonicalize_file_name)
-
-#else
-
-/* This declaration is solely to ensure that after preprocessing
-   this file is never empty.  */
-typedef int dummy;
-
-#endif
+#include <string.h> 
+#include <unistd.h> 
+#include <limits.h> 
+#if HAVE_SYS_PARAM_H || defined _LIBC 
+# include <sys/param.h> 
+#endif 
+#include <sys/stat.h> 
+#include <errno.h> 
+#include <stddef.h> 
+ 
+#ifdef _LIBC 
+# include <shlib-compat.h> 
+#else 
+# define SHLIB_COMPAT(lib, introduced, obsoleted) 0 
+# define versioned_symbol(lib, local, symbol, version) extern int dummy 
+# define compat_symbol(lib, local, symbol, version) 
+# define weak_alias(local, symbol) 
+# define __canonicalize_file_name canonicalize_file_name 
+# define __realpath realpath 
+# include "pathmax.h" 
+# include "malloca.h" 
+# include "dosname.h" 
+# if HAVE_GETCWD 
+#  if IN_RELOCWRAPPER 
+    /* When building the relocatable program wrapper, use the system's getcwd 
+       function, not the gnulib override, otherwise we would get a link error. 
+     */ 
+#   undef getcwd 
+#  endif 
+#  ifdef VMS 
+    /* We want the directory in Unix syntax, not in VMS syntax.  */ 
+#   define __getcwd(buf, max) getcwd (buf, max, 0) 
+#  else 
+#   define __getcwd getcwd 
+#  endif 
+# else 
+#  define __getcwd(buf, max) getwd (buf) 
+# endif 
+# define __readlink readlink 
+# define __set_errno(e) errno = (e) 
+# ifndef MAXSYMLINKS 
+#  ifdef SYMLOOP_MAX 
+#   define MAXSYMLINKS SYMLOOP_MAX 
+#  else 
+#   define MAXSYMLINKS 20 
+#  endif 
+# endif 
+#endif 
+ 
+#ifndef DOUBLE_SLASH_IS_DISTINCT_ROOT 
+# define DOUBLE_SLASH_IS_DISTINCT_ROOT 0 
+#endif 
+ 
+#if !FUNC_REALPATH_WORKS || defined _LIBC 
+/* Return the canonical absolute name of file NAME.  A canonical name 
+   does not contain any ".", ".." components nor any repeated path 
+   separators ('/') or symlinks.  All path components must exist.  If 
+   RESOLVED is null, the result is malloc'd; otherwise, if the 
+   canonical name is PATH_MAX chars or more, returns null with 'errno' 
+   set to ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, 
+   returns the name in RESOLVED.  If the name cannot be resolved and 
+   RESOLVED is non-NULL, it contains the path of the first component 
+   that cannot be resolved.  If the path can be resolved, RESOLVED 
+   holds the same value as the value returned.  */ 
+ 
+char * 
+__realpath (const char *name, char *resolved) 
+{ 
+  char *rpath, *dest, *extra_buf = NULL; 
+  const char *start, *end, *rpath_limit; 
+  long int path_max; 
+  int num_links = 0; 
+  size_t prefix_len; 
+ 
+  if (name == NULL) 
+    { 
+      /* As per Single Unix Specification V2 we must return an error if 
+         either parameter is a null pointer.  We extend this to allow 
+         the RESOLVED parameter to be NULL in case the we are expected to 
+         allocate the room for the return value.  */ 
+      __set_errno (EINVAL); 
+      return NULL; 
+    } 
+ 
+  if (name[0] == '\0') 
+    { 
+      /* As per Single Unix Specification V2 we must return an error if 
+         the name argument points to an empty string.  */ 
+      __set_errno (ENOENT); 
+      return NULL; 
+    } 
+ 
+#ifdef PATH_MAX 
+  path_max = PATH_MAX; 
+#else 
+  path_max = pathconf (name, _PC_PATH_MAX); 
+  if (path_max <= 0) 
+    path_max = 8192; 
+#endif 
+ 
+  if (resolved == NULL) 
+    { 
+      rpath = malloc (path_max); 
+      if (rpath == NULL) 
+        { 
+          /* It's easier to set errno to ENOMEM than to rely on the 
+             'malloc-posix' gnulib module.  */ 
+          errno = ENOMEM; 
+          return NULL; 
+        } 
+    } 
+  else 
+    rpath = resolved; 
+  rpath_limit = rpath + path_max; 
+ 
+  /* This is always zero for Posix hosts, but can be 2 for MS-Windows 
+     and MS-DOS X:/foo/bar file names.  */ 
+  prefix_len = FILE_SYSTEM_PREFIX_LEN (name); 
+ 
+  if (!IS_ABSOLUTE_FILE_NAME (name)) 
+    { 
+      if (!__getcwd (rpath, path_max)) 
+        { 
+          rpath[0] = '\0'; 
+          goto error; 
+        } 
+      dest = strchr (rpath, '\0'); 
+      start = name; 
+      prefix_len = FILE_SYSTEM_PREFIX_LEN (rpath); 
+    } 
+  else 
+    { 
+      dest = rpath; 
+      if (prefix_len) 
+        { 
+          memcpy (rpath, name, prefix_len); 
+          dest += prefix_len; 
+        } 
+      *dest++ = '/'; 
+      if (DOUBLE_SLASH_IS_DISTINCT_ROOT) 
+        { 
+          if (ISSLASH (name[1]) && !ISSLASH (name[2]) && !prefix_len) 
+            *dest++ = '/'; 
+          *dest = '\0'; 
+        } 
+      start = name + prefix_len; 
+    } 
+ 
+  for (end = start; *start; start = end) 
+    { 
+#ifdef _LIBC 
+      struct stat64 st; 
+#else 
+      struct stat st; 
+#endif 
+      int n; 
+ 
+      /* Skip sequence of multiple path-separators.  */ 
+      while (ISSLASH (*start)) 
+        ++start; 
+ 
+      /* Find end of path component.  */ 
+      for (end = start; *end && !ISSLASH (*end); ++end) 
+        /* Nothing.  */; 
+ 
+      if (end - start == 0) 
+        break; 
+      else if (end - start == 1 && start[0] == '.') 
+        /* nothing */; 
+      else if (end - start == 2 && start[0] == '.' && start[1] == '.') 
+        { 
+          /* Back up to previous component, ignore if at root already.  */ 
+          if (dest > rpath + prefix_len + 1) 
+            for (--dest; dest > rpath && !ISSLASH (dest[-1]); --dest) 
+              continue; 
+          if (DOUBLE_SLASH_IS_DISTINCT_ROOT 
+              && dest == rpath + 1 && !prefix_len 
+              && ISSLASH (*dest) && !ISSLASH (dest[1])) 
+            dest++; 
+        } 
+      else 
+        { 
+          size_t new_size; 
+ 
+          if (!ISSLASH (dest[-1])) 
+            *dest++ = '/'; 
+ 
+          if (dest + (end - start) >= rpath_limit) 
+            { 
+              ptrdiff_t dest_offset = dest - rpath; 
+              char *new_rpath; 
+ 
+              if (resolved) 
+                { 
+                  __set_errno (ENAMETOOLONG); 
+                  if (dest > rpath + prefix_len + 1) 
+                    dest--; 
+                  *dest = '\0'; 
+                  goto error; 
+                } 
+              new_size = rpath_limit - rpath; 
+              if (end - start + 1 > path_max) 
+                new_size += end - start + 1; 
+              else 
+                new_size += path_max; 
+              new_rpath = (char *) realloc (rpath, new_size); 
+              if (new_rpath == NULL) 
+                { 
+                  /* It's easier to set errno to ENOMEM than to rely on the 
+                     'realloc-posix' gnulib module.  */ 
+                  errno = ENOMEM; 
+                  goto error; 
+                } 
+              rpath = new_rpath; 
+              rpath_limit = rpath + new_size; 
+ 
+              dest = rpath + dest_offset; 
+            } 
+ 
+#ifdef _LIBC 
+          dest = __mempcpy (dest, start, end - start); 
+#else 
+          memcpy (dest, start, end - start); 
+          dest += end - start; 
+#endif 
+          *dest = '\0'; 
+ 
+#ifdef _LIBC 
+          if (__lxstat64 (_STAT_VER, rpath, &st) < 0) 
+#else 
+          if (lstat (rpath, &st) < 0) 
+#endif 
+            goto error; 
+ 
+          if (S_ISLNK (st.st_mode)) 
+            { 
+              char *buf; 
+              size_t len; 
+ 
+              if (++num_links > MAXSYMLINKS) 
+                { 
+                  __set_errno (ELOOP); 
+                  goto error; 
+                } 
+ 
+              buf = malloca (path_max); 
+              if (!buf) 
+                { 
+                  errno = ENOMEM; 
+                  goto error; 
+                } 
+ 
+              n = __readlink (rpath, buf, path_max - 1); 
+              if (n < 0) 
+                { 
+                  int saved_errno = errno; 
+                  freea (buf); 
+                  errno = saved_errno; 
+                  goto error; 
+                } 
+              buf[n] = '\0'; 
+ 
+              if (!extra_buf) 
+                { 
+                  extra_buf = malloca (path_max); 
+                  if (!extra_buf) 
+                    { 
+                      freea (buf); 
+                      errno = ENOMEM; 
+                      goto error; 
+                    } 
+                } 
+ 
+              len = strlen (end); 
+              if ((long int) (n + len) >= path_max) 
+                { 
+                  freea (buf); 
+                  __set_errno (ENAMETOOLONG); 
+                  goto error; 
+                } 
+ 
+              /* Careful here, end may be a pointer into extra_buf... */ 
+              memmove (&extra_buf[n], end, len + 1); 
+              name = end = memcpy (extra_buf, buf, n); 
+ 
+              if (IS_ABSOLUTE_FILE_NAME (buf)) 
+                { 
+                  size_t pfxlen = FILE_SYSTEM_PREFIX_LEN (buf); 
+ 
+                  if (pfxlen) 
+                    memcpy (rpath, buf, pfxlen); 
+                  dest = rpath + pfxlen; 
+                  *dest++ = '/'; /* It's an absolute symlink */ 
+                  if (DOUBLE_SLASH_IS_DISTINCT_ROOT) 
+                    { 
+                      if (ISSLASH (buf[1]) && !ISSLASH (buf[2]) && !pfxlen) 
+                        *dest++ = '/'; 
+                      *dest = '\0'; 
+                    } 
+                  /* Install the new prefix to be in effect hereafter.  */ 
+                  prefix_len = pfxlen; 
+                } 
+              else 
+                { 
+                  /* Back up to previous component, ignore if at root 
+                     already: */ 
+                  if (dest > rpath + prefix_len + 1) 
+                    for (--dest; dest > rpath && !ISSLASH (dest[-1]); --dest) 
+                      continue; 
+                  if (DOUBLE_SLASH_IS_DISTINCT_ROOT && dest == rpath + 1 
+                      && ISSLASH (*dest) && !ISSLASH (dest[1]) && !prefix_len) 
+                    dest++; 
+                } 
+            } 
+          else if (!S_ISDIR (st.st_mode) && *end != '\0') 
+            { 
+              __set_errno (ENOTDIR); 
+              goto error; 
+            } 
+        } 
+    } 
+  if (dest > rpath + prefix_len + 1 && ISSLASH (dest[-1])) 
+    --dest; 
+  if (DOUBLE_SLASH_IS_DISTINCT_ROOT && dest == rpath + 1 && !prefix_len 
+      && ISSLASH (*dest) && !ISSLASH (dest[1])) 
+    dest++; 
+  *dest = '\0'; 
+ 
+  if (extra_buf) 
+    freea (extra_buf); 
+ 
+  return rpath; 
+ 
+error: 
+  { 
+    int saved_errno = errno; 
+    if (extra_buf) 
+      freea (extra_buf); 
+    if (resolved == NULL) 
+      free (rpath); 
+    errno = saved_errno; 
+  } 
+  return NULL; 
+} 
+versioned_symbol (libc, __realpath, realpath, GLIBC_2_3); 
+#endif /* !FUNC_REALPATH_WORKS || defined _LIBC */ 
+ 
+ 
+#if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3) 
+char * 
+attribute_compat_text_section 
+__old_realpath (const char *name, char *resolved) 
+{ 
+  if (resolved == NULL) 
+    { 
+      __set_errno (EINVAL); 
+      return NULL; 
+    } 
+ 
+  return __realpath (name, resolved); 
+} 
+compat_symbol (libc, __old_realpath, realpath, GLIBC_2_0); 
+#endif 
+ 
+ 
+char * 
+__canonicalize_file_name (const char *name) 
+{ 
+  return __realpath (name, NULL); 
+} 
+weak_alias (__canonicalize_file_name, canonicalize_file_name) 
+ 
+#else 
+ 
+/* This declaration is solely to ensure that after preprocessing 
+   this file is never empty.  */ 
+typedef int dummy; 
+ 
+#endif